Pencil



F. H. KAY.

PENCIL.

APPLICATION FILED JUNE 2. 1921.

Patented Aug. 8, 1922.

Izzflegfiaf ZCZZTZCK; ,Kay

UNITE ATE"? FEQ FREDERICK H. KAY, OF CHICAGO, ILLINOIS.

PENCIL.

Application filed June 2,1921. Serial No. 474,395.

To all whom it may concern Be it known that I, FREDERICK H. KAY, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Pencils, of which the following is a specification.

This invention relates to a pencil having within its body a removablelead and means for advancing the same as desired.

It is a primary object of this invention to produce an inexpensivepencil which will utilize all the lead that is contained within itsbody, and further to provide a propelling means for the lead which isvery simple and certain in its operation. These and other objects willmore fully hereinafter appear from the specification and claims, andfrom the accompanying drawing wherein is shown a preferred embodiment ofmy invention in the manner following:

Figure 1 is a longitudinal section through the pencil;

Fig. 2 is a similar view, enlarged, of the block which lies rearwardlyof the lead, the adjoining parts also being shown;

Fig. 3 is a similar view showing the relation of the parts at the momentthe lead is advanced; and

Fig. 4 is a transverse section taken on line eL-:t of Fig. 3.

The present pencil comprises a body A having therein a lead B which isslidingly received within a central bore or aperture 0 which, as shown,may be square in cross section. At the upper or rear end of the pencilis a plug D which closes the bore.

The means for propelling the lead comprise a slidable impeller E whichmay be caused to move lengthwise in the pencil by properly manipulatingthe same and a blocl; F adjacent the rear end of the lead B adapt ed tobe driven forward by impact from the impeller. In order that the leadmay be held against retraction within the pencil, I have provided meansassociated with the block for assuring its movement in one directiononly. As appears best in Figs. 2 and 3, the block is formed with atransverse cut 5 that extends from one side of the block close to itsother side, being bordered by a transverse wall 6, an oblique wall 7,and an angular wall 8, as shown. Arranged within the cut thus formed isa dog 9 which is generally cubical in shape so as to be capable of lyingeither against the transverse wall 6 or the oblique wall 7, whileresting at the same time against the angular wall 8.

In advancing the lead the pencil is properly shaken or otherwisemanipulated to drive the impeller forward against the block, whose end10 abutting the lead is preferably oblique, as shown. During forwardmovement of the lead thedog assumes an uppermost position against thewall 6 so as to present one of its sides squarely against the walls ofthe bore C. The moment that the pencil is put to use, pressure appliedto the writing end of the lead will be communicated to the oblique end10 of the block so that with very slight movement the dog 9 is caused totilt to the position shown in Fig. 2 where one of its corners bites intothe wall surrounding the bore C. With the parts so related the blockwill be held against a retractive movement, thus maintaining the lead inits advanced position.

The construction heretofore described is very simple and may be producedat small cost. The invention is characterized by the use of an impellerdevice which acts to ad vance the lead through impact delivered to ablock which lies rearwardly of the lead, there being associated with theblock means for preventing retraction of the lead when pressure isapplied to its writing point.

I claim: v

1. A pencil having a body within which is a bore, a lead slidingly heldwithin the bore, a block within the bore arranged rearwardly of the leadand provided with a cut therein which faces one of the walls surroundingthe bore, a dog mounted within the block out and arranged to tilttherein to present its acting edge against the walls surrounding thebore whereby the block is locked against movement in a rearwarddirection, and a device arranged to slide freely within the bore andassociated with the block for ad-, vancing the same in a forwarddirection to thereby move the lead, substantially as described.

2. A pencil having a body in which is a bore, a lead slidingly heldwithin the bore, a block within the bore arranged rearwardly of thelead, friction means associated with the block adapted to wedginglyengage the walls surrounding the bore only when a retractive pressure isapplied to the block, and a device freely s'lidable within the bore foradvancing the block a forward direction to thereby move the lead,substantially as described. 3. A pencll having Within its body a bore,

a lead slidingly arranged Within the bore,

means slidingly secured Within the bore at the rear end of the leadadapted to move ment in, a rearward direction whereby the impeller maymove the: lead. through the medium of the block by impact in a forwarddireetiononly, substantially as described.

5. A pencil haying alead and an impeller therefor, each arrangedslidingly and Wholly Within the pencil body, and means interposedbetween the lead and impeller and adapted to move only in a forwarddirection;

whereby the lead is held against retraction,

substantially as described.

6. A pencil havinga lead and an impeller therefor, each arrangedslidingly and, Wholly Within the pencil b0dy,the impeller being adaptedto advance the lead by impact" thereupon, substantially as described.

' FREDERICK HZ KAY.

Witness:

EPHRAIM BANNING.

